Echoes of Ennius?

I’m playing with the idea that regibus regna reddere might have sounded Ennian to Cicero’s audience or that he might have been inspired for the alliterative turn of phrase from his exposure to Ennius. Just speculative, but here are some supporting details:

When commenting on Aeneid 3.333 (…regnorum reddita…) Servius is reminded at least by the verb of Ennius: